<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="../../react18/react.development.js"></script>
  <script src="../../react18/react-dom.development.js"></script>
  <script src="../../react18/babel.min.js"></script>
</head>

<body>
  <div id="app"></div>
  <script type="text/babel">
    class App extends React.Component{
      state = {
        eat : "牛肉",
        drink : "可乐"
      }

      render(){
        const {eat,drink} = this.state
        return (
          <div> 
          <h1>{eat}</h1>
          <hr/>
          <p>{drink}</p>
          <hr/>
          <Drink drink={drink}/>
          <hr/>
          <button onClick={this.changeHandle}>点击修改</button>
          </div>
        )
      }

      changeHandle = ()=>{
        let {eat,drink} = this.state
        this.setState(
          {
            eat : "猪肉",
            drink: "芬达"
          }
        )
      }
    }

    function Drink (props) {
      const {drink} = props
      return <p>{drink}</p>
    }

    // class Drink extends React.Component{
    //   render(){
    //     let {drink} = this.props
    //     drink="雪碧"
    //     return <p>{drink}</p>
    //   }
    // }

    const root = ReactDOM.createRoot(document.getElementById("app"))
    root.render(<App/>)
  </script>
</body>

</html>